Filter.



No. 705,447. Patented .luly'22, |902` w. H. SARGENT.

FILTER.

(Application filed Oct. 25 1901.)

Witwe/aseo' WM @5% I Tn: NoRms Pneus cu, Puomfumo.. WASHINGTON. u. c.

UNrTED STATES PATENT OFFICE.-

VILLIAM I-I. SARGENT, OF* CAMBRIDGE, MASSACHUSETTS.

FILTER.

SPECIFICATION forming part of Letters Patent No. 705,447, dated July 22,1902.

Application iiled October 2, 1901. v Serial No. 77,306. (No model.)

T0 all whom, it may con/cern,.-

Be it known that I, WILLIAM H. SARGENT, a citizen of the United States,residing at Cambridge, in the county of Middlesex and State ofMassachusetts, have invented new and'useful Improvements in Filters, ofwhich the following is a specification.

My invention relates to Iilters,`and is more;

especially an improvement upon the device shown and described in LettersPatent No. 434,570, granted to me on August 19,1890. Its primary objectis to provide an effective device of this character having an extendedltering-surface and which may be quickly cleansed and renewed. v

A further object of the invention is to provide a filter with a fabriccovering so constructed as to adapt it to contain and be satu` ratedwith a chemical purifying agent.

A further object is to so construct the tiltering-chamber as to adapt itto arrest heavy particles in the water and to breakthe force of theinflowing stream of water and insure an equal distribution thereof as itenters the filtering-chamber.

The construction of the improvement will be fully described hereinafterin connection with* the accompanying drawings, Which form a part of thisspecification, and its novel features will be defined in the appendedclaims.

In the drawings, Figure lis a view, partly in vertical section andpartly in elevation, of my improved filter applied to a'faucet-and withthe lower screen and thecharcoalremoved; and Fig. 2 is a similar viewshowing a modified form of chemical-holding pocket, the lower screen andthe charcoal being shown in position in the iilter. Y

The reference-numeral l .designates the outer casing of the filter,formed with an internal annular Iiange 2 and externally threaded, aslshown at 3, for the attachment of an internally-threaded funnel-shapeddischargespout 5. formed with an internally-threaded neck 6 to adapt itto be readily attached to a faucet 7.

' S designates the filtering-chamber, formed at its lower end with anannular horizontal iiange 9, upon which'the flange 2 of the casing reststo support the filtering-chamber in position.

The upper end of the casing l. is

`with any suitable purifying chemical.

The chamber 8 is perforated for the greater portion of its length, andabove and below the perforations are formed annular grooves l0 andll,for a purpose to be explained hereinafter.

The top of the chamber 8 is depressed to -form a concavity l2, whichserves as a trap to arrest any heavy particles contained in the waterand also as a spreader to distribute the water equalh7 on all sides ofthe filteringchamber.

Around the perforated portion of the chamber 8 issecured a sleeve ortube 13, of felt or other suitable fabric adapted to be saturated Thiscoveringis secured upon the chamber S by rings or wires 14, fittingwithin the grooves IO and Il. I preferably employ split rings ofresilient wire to secure the fabric in position; but this invention isnot restricted to any particular form of fastening wires `or rings.

The tube or sleeve 13 is extended below the lower ring 14 and turned upto form an annular pocket 15, adapted to contain a quantity of thechemical with which the fabric is satu- Clarnped between thedischarge-spout 5- and the flange 2 of the casing lis an annular ilange16, formed about a concavo-convex screen 17, extending across and intothe bottom of the chamber 8. This screen serves to .support a desiredquantity of charcoahquartz,

or other'suitable similar filtering material 18, arranged in the chamber8. The fabric covering 13 affords an extended filtering-surface, and byits use the charcoal or other material in the chamber S will last muchlonger.

A further advantageous feature of the invention is that owing to thevertical position of the fabric deposits thereon are to an extent Washedoff by the flow of water, and therefore do not accumulate upon ahorizontal filtering-surface.

While charcoal or other filtering material is shown in the chamber' S,this, together with the screen 17, may be dispensed with and the Icofabric 13 and the chemical referred to relied upon solely for filteringthe Water.

I claiml. A filter comprising an outer casing, a perforatedfiltering-chamber formed with annular grooves above and below itsperforations, a fabric covering for said perforatious, devices fittingsaid grooves for detachably securing the fabric iu position, and anannular chemical-containing pocket formed by said fabric at one endthereof and arranged outside the filtering-chamber.

2. A filter comprising a casing having an inlet and an outlet, aperforated casing therein forming a lteririg-chamber` a screeninterposed between the outlets of the chamber and casing, filteringmaterial supported upon said screen, a fabric covering for theperforated casing, a pocket formed thereby at one end and adapted tohold a chemical, said pocket being Within the outer casing and outsidethe perforated casing, and means for de- .tachably securing said fabricto the perforated casing, the upper end of said casing being depressedat a point below the inlet to the outer casing.

3. A filter comprising a casing having an inlet and an outlet, aperforated casing therein forming a filtering-chamber, a fabric coveringfor the perforated casing, a pocket formed thereby at one end andadapted t0 hold a chemical, said pocket being Within the outer casingand outside the perforated casing, and means for detachably securingsaid fabric to the perforated casing, the upper end of said casing beingdepressed at a point below the inlet to the outer casing.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM H. SARGENT.

Witnesses:

ALICE M. DENEHY, CLAUDE L. ALLEN.

